| 초록 |
Liquid-phase exfoliation (LPE) of transition metal dichalcogenide (TMD) nanosheets is a facile, cost-effective approach to photoelectric devices. Non-destructive exfoliation of nanosheets using dispersing agents is beneficial in rendering the TMD nanocomposite films suitable for flexible devices. Here, an efficient LPE of molybdenum disulfide (MoS2) with an amine modified poly(styrene-co-maleic anhydride) co-polymer (AM-PSMA) is demonstrated, wherein the maleic anhydrides were converted into maleic imides with primary amines using N-Boc-(CH2)n-NH2. The exfoliation of nanosheets was facilitated through Lewis acid-base interaction between amine group and transition metal. The results demonstrate that the exfoliation depends upon the fraction of primary amines in the polymer chain and their distance from the polymer backbone. Furthermore, a flexible composite film showed good photoconductive performances including a high Ion/Ioff ratio of 102 and a fast photocurrent switching of 300 ms. |
